Articles on Chemistry

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Mole Day is an unofficial holiday celebrated among chemists on Oct. 23, between 6:02 a.m. and 6:02 p.m. The time and date are derived from Avogadro’s number. Ekaterina_Minaeva/Shutterstock.com

A day to celebrate chemistry’s favorite unit — the mole. But what’s a mole?

Chemists sure know how to party. And here is the proof. On October 23rd they celebrate their hallowed unit: the mole. Find out what that's all about.
Your nose knows what’s on the way. Lucy Chian/Unsplash

Why you can smell rain

A weather expert explains where petrichor – that pleasant, earthy scent that accompanies a storm's first raindrops – comes from.
Westy48/Flickr.

Curious Kids: what is fire?

Put simply, it's the outcome of a chemical reaction, which humans learned how to make some 400,000 years ago.
The warming of the outside of the ice cube happens faster than the warming of the inside, causing it to crack. Mai Lam/The Conversation NY-BD-CC

Curious Kids: Why does ice make a cracking sound when water is poured on it?

Water is one of very few chemicals that is found as a liquid, solid and gas at any time on Earth. These three states of water help explain why ice makes a cracking sound when water is poured over it.

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